Postal scale



FIG. 1 is a perspective view of a postal scale showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a right side elevational view thereof.

The left side elevational view being substantially identical to the right side. 

The ornamental design for a postal scale, as shown and described. 